My car won't stop over heating. I just put a new water pump on it and the fan works its got a brand new thermostat. So does any one know what the problem is.

 

What radiator and what motor are you running?

 

Its not the radiator....the motor used to be in my girlfriends car. When it started over heating we put a new radiator and themostat into it and it still didn't fix it. The mechanic told us it was the water pump....I guess he was wrong.